I want to go to Xi during the Spring Festival holiday. What are the road conditions and weather from Chongqing to Xi 'an? How is the road surface?

I went to Xi in August, but I started from Chengdu. Starting from Chengdu, it is about 800km, except for the 40km national highway, which is all high-speed. However, this 40km, that is, the 40km bordering Shaanxi after Guangyuan left Sichuan, is already very old. The roads are narrow, and they are all super-large trucks, so it is difficult to overtake and traffic jams are easy. When we went there, we started to walk the 40km section around 2 pm, and walked for more than 4 hours, with a stop-and-go and traffic jam.

However, when I came back, I thought about staggering with the truck, so I chose to leave Xi 'an early, so I passed this section of the road smoothly at noon (it is said that all the truck drivers went to eat) without traffic jams. After more than seven hours, we returned to Chengdu.